LWF plot Alptal - Community: Alpthal / canton SZ - Date of installation: 31 May 1995 - Size of the plot: 0.6 ha - Altitude: 1149-1170 m - Mean slope: 23% - Geology (in German): Nordpenninikum; obere Kreide-unteres Eozän, Wägitaler Flysch - Soil types (WSL) : Mollic Gleysols, Gleyic Cambisols - Woodland association after EK72: 49: Equiseto-Abietetum - Main tree species: Picea abies - Management system: high forest - Silvicultural system: selection - Top-height diameter (quadratic average diameter of the 100 thickest trees per ha): 39.3 cm - Number of trees BHD >= 12 cm (2011): 321 - Maximum tree age: Picea abies 180-230 yr More Information: https://www.wsl.ch/en/forest/forest-development-and-monitoring/long-term-forest-ecosystem-research-lwf/sites/alptal.html